Pressure-regulator



UNITED STATES PATENT OFFICE.

MICHAEL HASTINGS, OF BROOKLYN, NE\V YORK, ASSIGNOR TO THOMAS WY. IVILLIAMS AND CHARLES A. IYILLIAMS, OF NE'W LONDON, CONNECTICUT.

PRESSURE-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 409,200, dated August 2D, 1889.

- Application filed March 9, 1889. Serial No. 302,600. (No model.)

To aZZ whom it may concern.-

Be it known that I, MIcHAEL HASTINGS, of Brooklyn, Kings county, and State of New York, have invented certain new and useful Improt ements in Pressure Regulators, of which the following is a specification, reference beinghad to the accompanying drawings.

My invention relates specially to the regulation of the air-pressure as developed by aircompressors or other pumping apparatus by the control of the admission of steam or other operating medium to the power-cylinder of said airco1npressors or pumping apparatus. In the development and control of the compressed air it is essential that provision, reliable and delicate in its operation, be made whereby the supply of operating medium be under the immediate automatic control of the resulting compression of air, so that a regular and equable pressure be maintained under all conditions and demands.

My invention consists in the arrangement, construction, and combination of the several parts or portions constituting the pressureregulator, as hereinafter shown and described.

In the accompanying drawings, Figure 1 represents a pressure-regulator embodying my improvements. Fig. 2 represents a crosssection on the horizontal center line of admission and discharge connections of supplyvalve for operating medium.

Similar letters of reference designate like parts or portions in all figures.

The letter A designates the valve-chamber of a steam-supply valve forming a portion of the pressore-regulator.

B designates a steamrsupply pipe or connection leading from boiler or generator to chamber A.

C designates a steam pipe or connection leading from chamber A to pumping-engine or compressor cylinders.

- D designates an annular valve operated by a stem E.

F designates a guide for said annular valve D and its stem E.

G designates a lever attached to stem E for the operation of the valve 1).

H designates a vibrating fulcrum upon which lever G operates.

I designates a resistance-spring to regulate and steady the movements of the valve D. (Z designates a circular seat for the valve D. Holesor perforations cl are made in the disk of valve D to balance the pressure upon the same to as great an extent as possible.

As a means for withdrawing the condensed steam or water from the chamber A, a small hole or opening a is made in the bottom of said chamber, and a plug, drain-pipe, or cock is inserted after the usual manner.

The letter J designates a cylinder into which compressed air is admitted to move an inclosed piston K, said piston being attached to and operated by a rod L.

M designates a lever attached to stem L for controlling the movement of piston K by any air-pressure brought to bear upon it.

N designates a fulcrum, fixed or vibrating, upon which the lever M operates.

O designates a guide for lever M.

P designates a resistance-spring inclosed in a casing Q and operating by means of rod R to regulate and steady the movement and lift of lever M and weight S. RodT connects the levers G and M of the steam and air systems together for mutual and joint control and action.

U designates the compressed-air inlet for cylinder J.

In the regular operation of this pressureregulatorcommunication with compressedair tank is maintained throughUwith the interior of cylinder .I, the increased or decreased pressure coming upon piston K tending to raise or lower the same in accordance with the position and volume of weight S. To

regulate to a nicety the air-pressure per in the regular operation the steam or equivalent medium for operating the compressors or pumps passes in at pipe-connection B, thence through the valve chamber A, as shown by the arrows, and out at pipe-connection C to the compressor or pumps for use. I11 the combined movement of the air and steam portions of the system an increase of pressure per square inch below the piston K develops an upward movement of the said piston, which movement is transmitted by means of rod L to the lever M to raise the said lever and its weight S. The upper movement of lever M is transmitted through rod T to steam-valve lever G, which in its turn raises stem or rod E, lifting annular valve D to come in contact with its seat d to cut off the supply of steam operating compressors or pumps. Owing to the extended circular opening but little movement of the valve is neces sary to open or close or increase or decrease the supply of steam to the power-cylinders of the compressors or pumps. A. decreased pressure per square inch would effect a reverse movement of the levers and connections and open the valve D. It will be noted upon examination that a reliable operation of the system can be effected without either one or both of the spring-regulators I and P; but the movements of the parts would be of the jumping character, whereas with the additions of these spring portions a very delicate and quite sensitive movement is the result, the ad 3' ustingscrews 1 and P assisting in such results.

Any of the well-known lift-valves may be used in lieu of the steam-valve here shown; but I prefer the one shown on account of delicate action and quick opening and closing. WVhat I claim as new, and desire to secure by Letters Patent, is-

1. The combination of a valve-chamber located within the line of steam-pipe supplying an air-compressor or pump-cylinder with steam, a perforated annular valve and valvestem moving within said valve-chamber, a special circular valve-guide operating within said perforated annular valve, a lever for operatin g said perforated valve and its stem, an air-pressure cylinder and inclosed piston and rod located within the line of air-pipe communicating with the compressed-air receiver or tank, a weighted lever operated by said piston and rod, and a communicating rod attached at one end to the lever operating the steam-valve and its stem and at the other end to the lever operated by said piston and rod of said air-pressure cylinder, substantially as and for the purposes set forth.

2. The combination of a valve-chamber having an annular valve and operating-stem of the character herein shown and described located within the line of steam-pipe supplying an air-compressor or pump cylinder with steam, a lever for operating said valve and stem, a resistance-spring acting upon said lever, an air-pressure cylinder and inclosed piston and rod located within the line of air-pipe communicating with the compressed-air receiver or tank, a Weighted lever operated by said piston and rod, a springregulator acting upon said lever, and a com municating rod attached at one end to the lever operating the steam-valve and stem and at the other end to the lever operated by said piston and rod of said air-pressure cylinder, substantially as shown and described.

MICHAEL HASTINGS, Witnesses:

WM. H. WEIo-HTMAN, MANUEL RODRIGUEZ. 

